The box art designers later admitted that they had deliberately chosen this theme in order to attract the customer with something original considering there were many space shooters in the market that looked alike.[citation needed] The Game Boy Advance release redesigned the cover in favor of a prominent spaceship image.

Contents

Story

Taking place in the year 2279, a planetary research project is sent into the depths of space. One particular group of researchers lands on and partly colonizes the alien planet Delia. However, sometime after their stay, an emergency transmission is sent from Delia to their security force orbiting the planet. The only clue they are given is a message regarding a hazardous leak. The planet's space fighters had become possessed by an unknown space squadron of alien bioships that appear out of nowhere and soon make themselves a hostile threat among the possessed fighters. The player assumes the role of Wink Baulfield (named Rick in the Game Boy Advanced version), an ace pilot assigned to investigate the disaster and possibly discover what is invading Delia in the assignment Operation Climax in the experimental space fighter the A/144 Phalanx.

Gameplay

The player's ship can switch to different three speed levels at any time, allowing the player to move fast to avoid enemies and obstacles entirely, or slow down to weave between enemy bullets. An unusual addition for a shooter at the time is the ability for the player's ship to take multiple hits before losing a life: the Phalanx had three hit points which could be restored by a certain power-up, which is important as health is persistent between levels. A variety of weapons can be picked up from items that certain enemies leave behind, and up to three can be stored at a time; further weapons replace the currently-equipped weapon when acquired. The player can switch between these weapons freely, and sacrifice a weapon to produce a "smart bomb" effect, freeing up the slot to grab another weapon without waste. The Extend was set at every 300,000 points. Difficulty can be adjusted between three levels in the options menu (unavailable during play), and primarily affects the number of bullets fired by enemies; a hidden "Funny" difficulty is available through the use of cheat codes, and escalates the game's difficulty dramatically.

Weapons and Items

L – Laser: Equips the ship with two stationary options, respectively above and below the ship, while changing the ship's attack to a piercing laser beam. Successive upgrades cause the options to fire beams as well, fore and aft, while increasing the beams' power. Its Smart Bomb attack causes the ship to spin rapidly, firing powerful bullets outward in a spiral pattern, while rendering the ship invulnerable.

H – Homing: Equips the ship with two options which orbit clockwise around the ship, while changing the ship's main weapon to a homing ball of energy. Upgrading causes the options to fire their own homing balls, and increases their power. Its Smart Bomb attack is a ball of energy that surrounds the ship, negating all damage and causing heavy damage to any enemy touched by the energy field.

E – Energizer: A charge weapon which fires energy bolts; charging increases the size and number of bolts fired; upgrades improve the maximum charge level. Its Smart Bomb attack is a full-screen antimatter reaction which causes continual damage to all visible enemies.

R – Ricochet: Equips the ship with two options which orbit the ship in opposing directions, while changing the ship's attack to a green ball of energy. Upgrading causes the options to fire similar balls of energy forward diagonally up and down, which bounce off flat walls or ceilings, and increases overall damage. Its Smart Bomb attack combines the two options into a single homing drone which engages enemies at melee range, killing them before seeking a new target. Unlike other Smart Bomb attacks, the ship remains vulnerable during this attack; additionally, the drone will frequently seek out invulnerable portions of enemies to attack, reducing its usefulness against bosses.

A – A-Type Missile: A standard side-weapon which launches homing missiles that detonate on impact.

B – B-Type Missile: A standard side-weapon which launches forward firing rockets that do not detonate, and damage all enemies along their path.